I learned this the hard way years ago when my first Dragon deck looked powerful on paper, but stalled every game because the commander did not support the tribe properly
The steps for this combo are pretty straightforward
Ursula, Deceiver of All boasts incredible artwork that's instantly recognizable as a unique form of one of Disney's very best villains, as well as a flashy effect that doubles the power of song cards
This card saw competitive play in a myriad of Water-type decks such as Alolan Ninetales-GX, Keldeo-EX, and most importantly, Greninja BREAK
When R&D was working on the Sixth Edition rule change, I brought up to Bill Rose (the current vice president of R&D, who was the head designer at the time, and was the one mainly responsible for overseeing the Sixth Edition rules) that the "tapped artifacts shut off" rule was confusing, non-intuitive, and constantly causing problems
Haste on many of these cards would have made them a lot better, it seems